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Finding the Fourth Proportional to 937.87, 1,406.45 and 321.41

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Solution

The fourth proportional to 937.87, 1,406.45 and 321.41 is: 481.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    937.87 : 1,406.45 = 321.41 : x
  2. Step 2: Convert to fraction form
    937.87/1,406.45 = 321.41/x
  3. Step 3: Cross multiply
    937.87x = 1,406.45 × 321.41
  4. Step 4: Simplify right side
    937.87x = 452,047.09
  5. Step 5: Solve for x
    x = 452,047.09/937.87
  6. Step 6: Final answer
    x = 481.99

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.